Rubber heel.



F. BERENSTEIN.

RUBBER HEEL.

APPLxcATloN FILED FEB.H,1916

QQQLQQ@ Patented Nov. 19, 1918.

F. BERENSTHN.

RUBBER HEELy APPLICATION FILED FEB. II. I9Is.

l 84599@ PIII-med Nov. I9, 1918.

2 SHEETS-SHED 2 FRANK IBERENSTEIN, OF CHELSEA, MASSACHUSETTS.

RUBBER HEEL.

Specification of Letters Patent.

Patented Nov. 119, iigi.

Application led February 11, 1916. Serial No. 77,603.

To all whom it may concern.'

Be it known that I, FRANK BERENSTEIN, a

citizen of the United States, resident of and other tread elements for boots and shoes, particularly to heels having an insertion or insertions of a friction plug or plugs, having for its object to provide improved means for retaining such plug or plugs in place in the heel.

lThe invention consists in the novel construction and combinations of parts, as hereinafter set forth.

It has been found in practice that the friction plug, which is usually composed of rubber-coated canvas material, will frequently become detached from its seat in the heel, the cementing or vulcanization connection between plug and heel beinginsecure, and applicant has discovered that by using a normally concavo-convex heel, flattened out when in use, the rubber at the bottom portion of the heel will be placed under compression, owing to straightening out of the normally bulging or convex bottom, to exert an elastic tension upon the plug to grip it securely and hold it in place. This compression of the rubber bottom portion of the heel will slightly, although perhaps insensibly, compress the bottom portion of the plug, the anchoring eii'ect being increased by the fact that the tension of the rubber material of the heel against the upper portion of the friction plug will be less than a the bottom thereof.

In the accompanying drawings, illustrating the invention, Figure 1 is a plan view of a heel having three hollow plugs therein; Fig. 2 is a similar view of a heel having one hollow plug at the right hand side thereof; Fig. 3 is a similar view of a heel having one hollow plug at the left hand side thereof;

Fig. 4 is a section on the line 4 4, Fig. l;

Fig. 5 is a similar view with the heel flattened out; Fig. 6 is a plan view of a heel having one solid plug therein; Fig. 7 is a section on the line 7 7, Fig. 6; Fig. 8 is a similar view with the heel flattened out; Fig. 9 is a side view of a concavo-convex heel, and Fig. 10 is an end view of the same. y In these drawings the numeral 2 designates the concavo-conveX heel, and 3 is the hollow plug, located in a recess 4 of the heel and connected at its sides to the heel in any suitable way, as by cementing, the fastening nail 5 engaging the cavity 5 of the plug and a center perforation 6 of a washer 7 at the back of the plug, the head of the nail engaging and being backed up by the portion of the washer marginal to the perforation thereof and overlying the cavity 5.

Other perforations or nail holes are shown 9 designates a solid plug engaging a seat 9 of the concavo-conveX heel, the nail holes inthis case being vall located without the plug, which has no washer at the back thereof.

As shown in the drawings, when the heel is flattened out the bottom portion 10 thereof will be compressed, this compression decreasing in a gradual ratio toward the top of the heel, the arcuate elements of the bottom surface of the heel becoming straight and shorter, and the arcuate elements of the top surface of the heel becoming straight.

claim:

1. The combination with a normally concavo-convex tread element for a shoe, said element having a recess therein, of afriction plug located within said recess.

2. The combination with a normally concavo-convex tread element for a boot or -shoe, said element having a recess therein, of a friction plug located within said recess, said element being flattened out when in use to cause the rubber material thereof to be compressed and placed under elastic tension to grip the plug and hold it in place.

3. The combination withv a rubber heel normally distorted from planular form and having a recess therein, of a friction plug located within said recess and gripped'by the rubber material thereof under compression and elastic tension when the heel is flattened out. -1

4. TheI combination with a rubber heel normally distorted from planular form and having a recess therein, of a friction plug' located within said recess.

5. The combination with a boot or shoe,

of a rubber heel normally distortedv from planular form and having a recess therein, and a friction plug located Within said recess, the rubber material at the bottom p0rtion of the heel being under elastic compression and gripping the plug to hold it in lace. p 6. The combination with a shoe, of a normally eoncaVo-convex rubber heel having a recess therein, and a friction plug located Within said recess, the rubber material at the bottom portion of the heel being under plug to hold it in place.

In testimony whereof I aiix my signature in presence of two Witnesses.

v FRANK BERENSTEIN.

Witnesses GEORGIE D. MASON, LELIA I. SPERLING. 

